Lamp



FIG. 1 is a perspective view of a lamp showing my new design;

FIG. 2 is a front elevation view thereof, a rear elevation view, a leftside elevation view, a right side elevation view being the same imagethereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the lamp whichform no part of the claimed design.

CLAIM The ornamental design for a lamp, as shown and described.